09-构造函数

 1     <script type="text/javascript">
 2         function Person(name, age, gender){
 3             this.name = name;
 4             this.age = age;
 5             this.gender = gender;
 6         }
 7         function Dog(name, age, gender){
 8             this.name = name;
 9             this.age = age;
10             this.gender = gender;
11             this.SayName = function(){
12                 alert(this.name);
13             }
14         }
15         var obj = new Person("孙悟空", 120, "男");
16         var obj2 = new Person("猪八戒", 10, "男");
17         var obj3 = new Person("沙和尚", 20, "男");
18         var obj4 = new Dog("旺财", 2, "男");
19 
20         console.log(obj);
21         console.log(obj2);
22         console.log(obj3);
23         console.log(obj4);
24         // obj4.SayName();
25     </script>